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Issue 10, 2015
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A structural investigation of heteroleptic lanthanide substituted cyclopentadienyl complexes

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Abstract

The substituted cyclopentadienyl group 1 transfer agents KCp′′, KCp′′′ and KCptt (Cp′′ = {C5H3(SiMe3)2-1,3}; Cp′′′ = {C5H2(SiMe3)3-1,2,4}; Cptt = {C5H3(tBu)2-1,3}) were prepared by modification of established procedures and the structure of [K(Cp′′)(THF)]·THF (1) was obtained. KCp′′ and KCptt were reacted variously with [Ln(I)3(THF)4] (Ln = La, Ce) in 2 : 1 stoichiometries to afford monomeric [La(Cp′′)2(I)(THF)] (2a·THF) and the dimeric complexes [La(Cp′′)2(μ-I)]2 (2a), [Ce(Cp′′)2(μ-I)]2 (2b) and [Ce(Cptt)2(μ-I)]2 (3). KCp′′′ was reacted with [Ce(I)3(THF)4] to afford the mono-ring complex [Ce(Cp′′′)(I)2(THF)2] (4), regardless of the stoichiometric ratio of the reagents. Complex 4 was reacted with [KN(SiMe3)2] to yield [Ce(Cp′′′)2(I)(THF)] (5), [Ce(Cp′′′){N(SiMe3)2}2] (6) and [Ce{N(SiMe3)2}3] by ligand scrambling. Complexes 1–6 have all been structurally authenticated and are variously characterised by other physical methods.

Graphical abstract: A structural investigation of heteroleptic lanthanide substituted cyclopentadienyl complexes

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Supplementary files

Article information


Submitted
26 Mar 2015
Accepted
11 May 2015
First published
12 May 2015

This article is Open Access

New J. Chem., 2015,39, 7633-7639
Article type
Paper

A structural investigation of heteroleptic lanthanide substituted cyclopentadienyl complexes

F. Ortu, J. M. Fowler, M. Burton, A. Formanuik and D. P. Mills, New J. Chem., 2015, 39, 7633
DOI: 10.1039/C5NJ00761E

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